Abstract
The Amurum Forest Reserve is one of the nature reserves in Plateau State North central Nigeria. Strict Nature reserve is prominent among the methods for in situ conservation of biodiversity in Nigeria and also the world at large. A study was conducted in the Forest across three habitat types in order to measure tree height and diameter at breast height (dbh) of trees. 50m x 50m plots were marked across the habitat types by simple random sampling technique. Trees and shrubs were identified to species level. Measurement were limited to all woody plants with diameter at breast height (dbh) of ≥ 10cm. Data collected was analyzed in excel. A total of 397 woody species were identified during the study period. 87.7 of the plants were shrubs while 12.3% were trees. The gallery forest had the highest diameter class(30-35cm) followed by the savanna(25-30cm) and lastly the rocky outcrop with the diameter class of 20-25cm.The rocky outcrop had the highest number of trees with the lowest dbh (10-15cm) while the gallery forest had more trees in the highest diameter class (30-35) (Figure 2). The highest mean height distribution in the Gallery forest shows that the plant communities in this habitat type has grown over the years without disturbance since the place is a protected site. Therefore, other surrounding bushes should be protected in order to preserve species from local extinction.
Highlights
The accurate measurement of tree height and diameter at breast height remains a very important input variable for growth and yield models and are important predictive models for determining canopy and thickness of forests (Liu et al, 2017)
Strict Nature reserve is prominent among the methods for in situ conservation of biodiversity in Nigeria and the world at large (Adenkunle et al, 2013)
A woody plant is any plant that has wood as its structural tissue and is either a tree, shrub or a liana which is usually described as a perennial plant whose stems and larger roots are reinforced with wood produced from secondary xylem and contains roots that are usually covered by a layer of bark (Chase and Mark, 2004)
Summary
The accurate measurement of tree height and diameter at breast height (dbh) remains a very important input variable for growth and yield models and are important predictive models for determining canopy and thickness of forests (Liu et al, 2017). The Amurum Forest Reserve is one of the nature reserves in Plateau State North central Nigeria. Loss of habitat leads to species extinction and has negative consequences for medicinal research and local populations who rely on the plants in the forest for medicine (Alina, 2005). Study Area: The study was carried out in Amurum A total of 397 woody plants belonging to 49 species
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